HeyGen vs Synthesia: Which Is More Trustworthy?
At a glance: verified facts
| Fact | HeyGen | Synthesia |
|---|---|---|
| Operated by | HeyGen Technology Inc. | Synthesia Ltd |
| Country | United States | United Kingdom |
| Founded | 2020 | 2017 |
| Founders public | Yes | Yes |
| Official iOS app | ✓ AI Video Generator - HeyGen | None found — 1 lookalike on the App Store |
| Policy changes we track | None detected | None detected |
| Last data check | 2026-08-01 | 2026-08-01 |
From public records (company registry, RDAP, App Store metadata) and our policy snapshots — a "—" means we have no verified data for that field yet.
What the evidence shows
Both are ai avatar & talking-head video tools we track. Comparing the 4 trust dimensions measured for both:
- On company & identity, the two are effectively tied (16/16 vs 16/16).
- On data & privacy, the two are effectively tied (5.5/10 vs 5.5/10).
- On billing & subscription, the two are effectively tied (8/8 vs 8/8).
- HeyGen leads on community reputation (6.26/7.5 vs 2.51/3.75).
Not yet measured for either tool: Product Reality — this comparison covers only what we verified.
Quick verdicts
HeyGen: HeyGen earns a grade A (86.2/100) on our evidence-based trust rubric, measured on 4 of 5 trust dimensions. It scores strongly on company & identity but only moderately on data & privacy (5.5/10). We have not yet assessed product reality, so the grade is provisional.
Synthesia: Synthesia earns a grade A (84.8/100) on our evidence-based trust rubric, measured on 4 of 5 trust dimensions. It scores strongly on company & identity but only moderately on data & privacy (5.5/10). We have not yet assessed product reality, so the grade is provisional.
Trust score breakdown
| Dimension | HeyGen | Synthesia |
|---|---|---|
| Company & Identity | 16/16 | 16/16 |
| Data & Privacy | 5.5/10 | 5.5/10 |
| Billing & Subscription | 8/8 | 8/8 |
| Product Reality | — | — |
| Community Reputation | 6.26/7.5 | 2.51/3.75 |
| Total | 86.2/100 | 84.8/100 |
What their privacy policies say about AI training
HeyGen (policy captured 2026-06-11):
HeyGen acts as a data controller when processing personal data for its own independently determined purposes, including account administration, platform security, service improvement, AI model training, analytics, and marketing, as further described in Section 4.
Quoted verbatim from each vendor's own privacy policy — full context and more excerpts on each tool's report page.
Frequently asked questions
Is HeyGen more trustworthy than Synthesia?
HeyGen currently scores higher — 86/100 vs 85/100 — across the 4 trust dimensions measured for both. That covers documented evidence only, not features or pricing.
Is HeyGen legit?
HeyGen currently holds trust grade A (86/100) based on 4 of 5 trust dimensions, and is operated by HeyGen Technology Inc.. The grade reflects only what we have measured; anything not yet assessed is marked as pending on the full report.
Is Synthesia legit?
Synthesia currently holds trust grade A (85/100) based on 4 of 5 trust dimensions, and is operated by Synthesia Ltd. The grade reflects only what we have measured; anything not yet assessed is marked as pending on the full report.
More AI Avatar & Talking-Head Video comparisons
How this comparison works
Both tools are scored with the same five-dimension, 100-point rubric — company identity, data privacy, billing, product reality and reputation — using documented evidence only; a dimension with no evidence stays unscored instead of guessed. Read the full reports: HeyGen trust report · Synthesia trust report, or run any other tool through the trust check.